Question

Write a hypothesis about how the number of half-lives affects the number of radioactive atoms. use the "if . . . then . . . because . . ." format and be sure to answer the lesson question: "how does the number of radioactive atoms change over time?"

Answer 1

If the number of half-lives increases, then the number of radioactive atoms decreases, because about half of the atoms'nuclei decay with each half life.